Thanks to this site, I've gained a pretty good understanding of how grading is done on SS's. Through experience with 3 different on line purveyors, I've seen 1st hand that there are wide variances between different "graders" when it come to the opinions. But here is a question for you experts.
Grades are assigned prior to the pearls being set or strung, right? So if a group of pearls is graded AAA, then set or strung in a way that the inclusion is no longer visible, ie drilled out, how would a GIA appraiser know that the piece was not a gem grade? or would he/she know? (assume no prior knowledge of the grade of the individual pearls prior to drilling) Also assume that luster/overtone etc is gem standard.
Curious minds want to know! Hopefully my question is understandable?